JP5639847B2 - Gas flow controller for arc welding - Google Patents
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Description
本発明は、ガスシールドアーク溶接に使用するアーク溶接用ガス流量制御器に関するものである。 The present invention relates to a gas flow controller for arc welding used for gas shielded arc welding.
ガスシールドアーク溶接装置の従来例を図２に示す。溶接トーチ１がワイヤ送給装置５０に接続され、シールドガス供給源５４とワイヤ送給装置５０との間は配管５２で接続されている。シールドガス供給源５４は一般にガスボンベが使用されるが大きく重いため、溶接作業範囲を広くして作業性をよくするために、配管５２を３ｍ〜２０ｍ、あるいはそれ以上に長くしている。シールドガス供給源５４にはガス圧力調整器及び流量調整器５３が直結されており、溶接トーチ１から溶接部に放出するするシールドガスの流量を設定している。ワイヤ送給装置５０には、ガスバルブ５１が備えられており、溶接トーチ１のトーチスイッチの信号と連動してガスバルブ５１が開閉するようになっている。
A conventional example of a gas shielded arc welding apparatus is shown in FIG. The
溶接作業中のガス通路内の圧力は圧力損失を伴うため、下流側の圧力が低くなっており、図２のＡ点、Ｂ点、Ｃ点における圧力をそれぞれＰＡ、ＰＢ、ＰＣとすると、ＰＡ＞ＰＢ＞ＰＣとなっている。溶接作業が終了して、ガスバルブ５１が閉じられると、Ｂ点の圧力ＰＢがＰＡまで上昇する。このため、次に溶接作業を開始するためガスバルブ５１を開くと、配管５２にたまった圧力ＰＡのシールドガスが定常時の圧力ＰＢとなるまで過渡的に突流となって溶接トーチから放出される。図３はノズルから放出されるシールドガス流量の変化をグラフにしたものであり、溶接開始時はＬ１のように設定流量より過大のガスが流れるため、ガスが無駄になるという問題があった。このため、特許文献１や特許文献２のような装置が提案されている。
Since the pressure in the gas passage during the welding operation is accompanied by pressure loss, the pressure on the downstream side is low. If the pressures at points A, B, and C in FIG. 2 are PA, PB, and PC, respectively, > PB> PC. When the welding operation is completed and the gas valve 51 is closed, the pressure PB at point B rises to PA. For this reason, when the gas valve 51 is opened to start the welding operation next time, the shield gas of the pressure PA accumulated in the pipe 52 is transiently rushed and discharged from the welding torch until the pressure PB at the steady state is reached. FIG. 3 is a graph showing the change in the flow rate of the shield gas discharged from the nozzle. At the start of welding, a gas larger than the set flow rate flows like L1, and there is a problem that the gas is wasted. For this reason, apparatuses like
特許文献１では、ガス圧力調整器及び流量調整器５とは別に、図２のＢ点の位置にガス圧力調整器を追加するというものである。この方法では、装置が高価になるという問題があった。
In
特許文献２では、シールドガス通路内にシールドガスの流量を絞るオリフィスを構成するチューブを設けるというものである。この方法では、オリフィスの内径に対してオリフィスの長さが長くなり、穴加工が難しいため製作費が高価になるという問題があった。 In Patent Document 2, a tube constituting an orifice for reducing the flow rate of the shield gas is provided in the shield gas passage. This method has a problem that the length of the orifice is longer than the inner diameter of the orifice, and the manufacturing cost is high because the hole machining is difficult.
作業性をよくするために溶接作業範囲を広げようとすると、配管５２の長さを長くする必要があるが、溶接開始前に配管５２に蓄積されるシールドガスの体積が増すため、突流による無駄なガスの消費が増えるという問題があった。 To increase the welding work range in order to improve workability, it is necessary to increase the length of the pipe 52. However, since the volume of shield gas accumulated in the pipe 52 increases before the start of welding, waste due to rush current is increased. There was a problem of increased consumption of gas.
溶接開始時に突流が発生すると、ノズル４１から放出されるガスの流速が増すため、乱流となって空気の巻き込みが発生して溶接欠陥を発生するという問題も発生する。 If a rush flow is generated at the start of welding, the flow rate of the gas released from the nozzle 41 increases, which causes a problem that a turbulent flow causes air entrainment and a welding defect.
本発明は、ガスシールドアーク溶接の溶接開始時におけるシールドガスの突流を低減させるアーク溶接用ガス流量制御器を提供することを目的としている。 An object of the present invention is to provide a gas flow controller for arc welding that reduces a rush of shielding gas at the start of welding in gas shielded arc welding.
第１の発明は、
アーク溶接装置のシールドガス配管の途中に設けられた、シールドガスの突流を抑制するためのアーク溶接用ガス流量制御器において、
前記ガス流量制御器は、前記シールドガス流れと平行な貫通穴が、前記シールドガス配管の上流側が接続された側に形成された制御器本体と、
前記貫通穴に同軸に挿入されたロッド部を備えたガス流制御子とを備えて、
前記貫通穴の内面と前記ロッド部の外面との間に環状ガス通路を形成し、
前記シールドガスが前記環状ガス通路を前記ロッド部の軸心部方向に流れ、
前記環状ガス通路の断面積は、溶接作業中の定常時の圧力において所定のシールドガス流量を確保できる断面積であり、
前記ロッド部外径と前記貫通穴内径との間の距離が、溶接開始時における突流を抑制する微少すき間に設定されて、前記シールドガスが前記環状ガス通路を通過すると圧力損失により突流が低減されるように、前記環状ガス通路が、溶接開始時における前記シールドガスの突流を抑制する前記シールドガスの粘性を発生するように形成されたことを特徴とするアーク溶接用ガス流量制御器である。
The first invention is
In the gas flow controller for arc welding, which is provided in the middle of the shield gas piping of the arc welding apparatus, for suppressing the rush of shield gas,
The gas flow rate controller has a controller body in which a through hole parallel to the shield gas flow is formed on the side to which the upstream side of the shield gas pipe is connected;
A gas flow controller including a rod portion inserted coaxially into the through hole,
An annular gas passage is formed between the inner surface of the through hole and the outer surface of the rod portion ,
The shielding gas flows through the annular gas passage toward the axial center of the rod portion;
The cross-sectional area of the annular gas passage is a cross-sectional area that can ensure a predetermined shield gas flow rate at a steady-state pressure during welding work,
When the distance between the outer diameter of the rod portion and the inner diameter of the through hole is set to a small gap that suppresses the rush flow at the start of welding, and the shield gas passes through the annular gas passage, the rush flow is reduced due to pressure loss. As described above, the gas flow controller for arc welding is characterized in that the annular gas passage is formed so as to generate the viscosity of the shield gas that suppresses the rush of the shield gas at the start of welding.
第２の発明は、
前記制御器本体は、基端側に前記シールドガス配管の上流側が接続され、基端側に前記貫通穴が形成された第１の配管接続部材と、
基端側に前記第1の配管接続部材の先端側が接続されて、先端側に前記シールドガス配管の下流側が接続される第２の配管接続部材と、を備え、
前記ガス流制御子は、基端側に形成された前記ロッド部が前記貫通穴に同軸に挿入され、先端側にフランジ部を形成し、前記フランジ部に基端側から先端側に貫通するオリフィスを備え、前記フランジ部が前記第１の配管接続部材と前記第２の配管接続部材との間に固定されたことを特徴とする請求項１に記載のアーク溶接用ガス流量制御器である。
The second invention is
The controller main body is connected to the upstream side of the shield gas pipe on the base end side, and a first pipe connecting member having the through hole formed on the base end side;
A distal end side of the first pipe connection member is connected to the proximal end side, and a second pipe connection member is connected to the distal end side of the downstream side of the shield gas pipe,
The gas flow controller is an orifice in which the rod portion formed on the proximal end side is inserted coaxially into the through hole, forms a flange portion on the distal end side, and penetrates the flange portion from the proximal end side to the distal end side. The gas flow controller for arc welding according to
本発明のアーク溶接用ガス流量制御器は、ガスシールドアーク溶接の溶接開始時におけるシールドガスの突流を低減させることができる。 The gas flow controller for arc welding of the present invention can reduce the rush of shield gas at the start of welding in gas shielded arc welding.
［実施の形態１］
発明の実施の形態を実施例に基づき図面を参照して説明する。
図１は本発明の実施の形態１のアーク溶接用ガス流量制御器の部分断面図である。実施の形態１では、本発明のアーク溶接用ガス流量制御器６を配管５２とガスバルブ５１との間（図３のＢ点）に取り付ける実施例を示すが、ガスバルブ５１と溶接トーチ１との間（図３のＣ点）又は溶接トーチ１内部のガス通路中に取り付けることも可能である。図１では、シールドガス供給源５４方向をＸ１方向、溶接トーチ１方向をＸ２方向としている。
[Embodiment 1]
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on examples with reference to the drawings.
1 is a partial cross-sectional view of a gas flow controller for arc welding according to
第１の配管部材６１の基端側（Ｘ１方向）外周面には、配管５２の内径に応じた配管接続口６１ｂが形成されて、配管５２が接続されている。第１の配管部材６１の先端側（Ｘ２方向）外周面には、雄ねじが形成されて、後述する第２の配管部材６２がねじ込まれている。第１の配管部材６１の基端側（Ｘ１方向）軸中心部には円筒状穴であるガス導入路６１ｃが形成され、第１の配管部材６１の中央軸中心部に、ガス導入路６１ｃに連通する貫通穴６１ａが形成され、第１の配管部材６１の先端側（Ｘ２方向）に形成された円筒状のチャンバ部に連通している。チャンバ部の先端側（Ｘ２方向）にはチャンバ部より内径の大きい収納穴が形成されて、収納穴の基端側（Ｘ１方向）に段部を形成している。 A pipe connection port 61 b corresponding to the inner diameter of the pipe 52 is formed on the base end side (X1 direction) outer peripheral surface of the first pipe member 61, and the pipe 52 is connected thereto. On the distal end side (X2 direction) outer peripheral surface of the first piping member 61, a male screw is formed, and a second piping member 62 described later is screwed. A gas introduction path 61c, which is a cylindrical hole, is formed at the base end side (X1 direction) axis central portion of the first piping member 61, and the gas introduction path 61c is formed at the central axis central portion of the first piping member 61. A communicating through hole 61 a is formed, and communicates with a cylindrical chamber portion formed on the tip side (X2 direction) of the first piping member 61. A storage hole having an inner diameter larger than that of the chamber portion is formed on the distal end side (X2 direction) of the chamber portion, and a step portion is formed on the proximal end side (X1 direction) of the storage hole.
ガス流制御子６３は、基端側（Ｘ１方向）にロッド部６３ａを備え、先端側（Ｘ２方向）にフランジ部６３ｃを形成している。ロッド部６３ａの外径は貫通穴６１ａの内径より大きく形成され、ロッド部６３ａが貫通穴６１ａに挿入されて、ロッド部６３ａの外周面と貫通穴６１ａの内周面との間に環状ガス通路７０を形成している。環状ガス通路７０の断面積は、溶接作業中の定常時の圧力において所定のシールドガス流量を確保できる断面積であり、ロッド部６３ａ外径と貫通穴６１ａ内径との間の距離は、溶接開始時における突流を抑制する微少すき間に設定されている。フランジ部６３ｃの外径は第１の配管部材６１の収納穴の内径と同じに形成され、フランジ部６３ｃが収納穴に挿入されて、フランジ部６３ｃの基端側（Ｘ１方向）端面が収納穴の段部に押し当てられている。フランジ部６３ｃの外周面とロッド部６３ａ外周面とを通って、フランジ部６３ｃの基端側端面（Ｘ１方向）から先端側端面（Ｘ２方向）に向けて貫通したオリフィス６３ｂが形成されている。 The gas flow control element 63 includes a rod portion 63a on the proximal end side (X1 direction) and a flange portion 63c on the distal end side (X2 direction). The outer diameter of the rod portion 63a is formed larger than the inner diameter of the through hole 61a, the rod portion 63a is inserted into the through hole 61a, and an annular gas passage is formed between the outer peripheral surface of the rod portion 63a and the inner peripheral surface of the through hole 61a. 70 is formed. The cross-sectional area of the annular gas passage 70 is a cross-sectional area that can ensure a predetermined shield gas flow rate at a steady pressure during the welding operation, and the distance between the outer diameter of the rod portion 63a and the inner diameter of the through hole 61a is the start of welding. It is set as a small gap that suppresses the rush flow at the time. The outer diameter of the flange part 63c is formed to be the same as the inner diameter of the accommodation hole of the first piping member 61, the flange part 63c is inserted into the accommodation hole, and the base end side (X1 direction) end surface of the flange part 63c is the accommodation hole. It is pressed against the step. An orifice 63b penetrating from the proximal end surface (X1 direction) to the distal end surface (X2 direction) of the flange portion 63c is formed through the outer peripheral surface of the flange portion 63c and the outer peripheral surface of the rod portion 63a.
第２の配管部材６２の基端側（Ｘ１方向）軸中心には、第１の配管部材６１の雄ねじに対応する雌ねじが形成されて、第１の配管部材６１にねじ込まれている。第１の配管部材６１と第２の配管部材６２との嵌合部には、適宜Ｏリングなどのシール部材を挿入して、ガスの気密が保たれている。第２の配管部材６２の先端側（Ｘ２方向）軸中心に雌ねじより径の小さいガス通路６２ａが形成され、ガス通路６２ａと雌ねじとの間の軸直角面に内壁が形成されて、この内壁がガス流制御子６３の先端側（Ｘ２方向）端面に押し当てられている。内壁がガス流制御子６３のオリフィス６３ｂを塞がないようにガス通路６２ａの内径を設定するか、又は図１に示すようにガス通路６２ａの基端部を拡径して、オリフィス６３ｂがガス通路６２ａに連通している。第２の配管部材６２の先端側（Ｘ２方向）外周面には、配管５２の内径に応じた配管接続口が形成されて、配管５２が接続されている。 An internal thread corresponding to the external thread of the first piping member 61 is formed at the base end side (X1 direction) axis center of the second piping member 62 and screwed into the first piping member 61. Sealing members such as O-rings are appropriately inserted into the fitting portions between the first piping member 61 and the second piping member 62 to maintain gas tightness. A gas passage 62a having a diameter smaller than that of the female screw is formed at the tip end side (X2 direction) axis center of the second piping member 62, and an inner wall is formed on a plane perpendicular to the axis between the gas passage 62a and the female screw. It is pressed against the end surface (X2 direction) end surface of the gas flow controller 63. The inner diameter of the gas passage 62a is set so that the inner wall does not block the orifice 63b of the gas flow controller 63, or the base end of the gas passage 62a is expanded as shown in FIG. It communicates with the passage 62a. A pipe connection port corresponding to the inner diameter of the pipe 52 is formed on the distal end side (X2 direction) outer peripheral surface of the second pipe member 62, and the pipe 52 is connected thereto.
シールドガス供給源５４から送られるシールドガスは、配管５２を通ってガス流量制御器６のガス導入路６１ｃに入り、環状ガス通路７０、チャンバ部７１ｄ、オリフィス６３ｂ、ガス通路６２ａを通って溶接トーチ１方向に送られる。 The shield gas sent from the shield gas supply source 54 enters the gas introduction path 61c of the gas flow rate controller 6 through the pipe 52, and passes through the annular gas passage 70, the chamber portion 71d, the orifice 63b, and the gas passage 62a to form a welding torch. Sent in one direction.
以下、動作を説明する。溶接作業を開始するためガスバルブ５１を開くと、配管５２にたまった圧力ＰＡのシールドガスが突流となって溶接トーチ１方向（Ｘ２方向）に流れようとする。環状ガス通路７０はロッド部６３ａ外径と貫通穴６１ａ内径との間の距離が突流を抑制する微少すき間に設定されており、シールドガスが環状ガス通路７０を通過すると圧力損失により突流が低減される。
The operation will be described below. When the gas valve 51 is opened to start the welding operation, the shield gas of the pressure PA accumulated in the pipe 52 becomes a rush current and tends to flow in the
配管５２のＢ点の圧力がＰＢまで下がると、定常流れとなる。環状ガス通路７０の断面積は、定常時の圧力において所定のシールドガス流量を確保できる断面積であるため、設定流量のシールドガスが、ガス流量制御器６を通って、溶接トーチ１方向に送られる。
When the pressure at point B of the pipe 52 drops to PB, a steady flow is obtained. Since the cross-sectional area of the annular gas passage 70 is a cross-sectional area that can secure a predetermined shield gas flow rate at a steady-state pressure, the set flow rate of the shield gas passes through the gas flow rate controller 6 in the direction of the
上記のように、本発明によるガス流量制御器６は、環状ガス通路７０が微少すき間を形成しているため、溶接開始時における突流が低減されて、無駄なシールドガスの消費を抑制できるという効果を奏する。 As described above, in the gas flow rate controller 6 according to the present invention, since the annular gas passage 70 forms a minute gap, the rush flow at the start of welding is reduced, and the consumption of useless shield gas can be suppressed. Play.
本発明による溶接トーチは、突流を低減するための高価な圧力調整器を備えていない溶接装置にも使用でき、安価に突流を低減することができるという効果を奏する。 The welding torch according to the present invention can be used for a welding apparatus that does not include an expensive pressure regulator for reducing rush flow, and has the effect of reducing rush flow at low cost.
本発明によるガス流量制御器６の環状ガス通路７０は、ロッド部６３ａ外径と貫通穴６１ａ内径との間のすき間により形成されるため、貫通穴６１ａの内径を精度良く低価格で加工しやすい大きさに設定し、この内径に応じた寸法にロッド部６３ａの外径を製作すればよいので、製作費を低減できるという効果を奏する。 Since the annular gas passage 70 of the gas flow rate controller 6 according to the present invention is formed by a gap between the outer diameter of the rod portion 63a and the inner diameter of the through hole 61a, the inner diameter of the through hole 61a is easy to process with high accuracy and low cost. Since the outer diameter of the rod portion 63a may be set to a size and the outer diameter of the rod portion 63a should be manufactured to a size corresponding to the inner diameter, the manufacturing cost can be reduced.
本発明によるガス流量制御器６の環状ガス通路７０は、ロッド部６３ａ外径と貫通穴６１ａ内径との間のすき間により形成される。貫通穴６１ａの内径を十分大きくすることで、溶接作業中の定常時の圧力において所定のシールドガス流量を流す断面積を確保しながら、ロッド部６３ａ外径と貫通穴６１ａ内径との間に微少すき間を形成することができる。このため、溶接開始時におけるシールドガスの突流を抑制するシールドガスの粘性を発生させることができ、無駄なシールドガスの消費を抑制できるという効果を奏する。 The annular gas passage 70 of the gas flow rate controller 6 according to the present invention is formed by a gap between the outer diameter of the rod portion 63a and the inner diameter of the through hole 61a. By making the inner diameter of the through-hole 61a sufficiently large, a small cross-section is obtained between the outer diameter of the rod portion 63a and the inner diameter of the through-hole 61a while ensuring a cross-sectional area that allows a predetermined shield gas flow rate to flow at a steady pressure during welding work. A gap can be formed. For this reason, the viscosity of the shield gas that suppresses the rush of the shield gas at the start of welding can be generated, and there is an effect that consumption of unnecessary shield gas can be suppressed.
溶接開始時の突流を低減するので、溶接トーチのノズル４１から放出されるシールドガスが乱流となりにくく空気の巻き込みを押さえて、溶接欠陥の発生を防止できるという効果を奏する。 Since the rush flow at the start of welding is reduced, the shield gas released from the nozzle 41 of the welding torch is less likely to be a turbulent flow, and it is possible to suppress the entrainment of air and prevent the occurrence of welding defects.
１ 溶接トーチ
５ 流量調整器
６ ガス流量制御器
４１ ノズル
５０ ワイヤ送給装置
５１ ガスバルブ
５２ 配管
５３ 流量調整器
５４ シールドガス供給源
６１ 配管部材
６１ａ 貫通穴
６１ｃ ガス導入路
６２ 配管部材
６２ａ ガス通路
６３ ガス流制御子
６３ａ ロッド部
６３ｂ オリフィス
６３ｃ フランジ部
６３ｄ オリフィス
７０ 環状ガス通路
７１ｄ チャンバ部
DESCRIPTION OF
Claims (2)
前記ガス流量制御器は、前記シールドガス流れと平行な貫通穴が、前記シールドガス配管の上流側が接続された側に形成された制御器本体と、
前記貫通穴に同軸に挿入されたロッド部を備えたガス流制御子とを備えて、
前記貫通穴の内面と前記ロッド部の外面との間に環状ガス通路を形成し、
前記シールドガスが前記環状ガス通路を前記ロッド部の軸心部方向に流れ、
前記環状ガス通路の断面積は、溶接作業中の定常時の圧力において所定のシールドガス流量を確保できる断面積であり、
前記ロッド部外径と前記貫通穴内径との間の距離が、溶接開始時における突流を抑制する微少すき間に設定されて、前記シールドガスが前記環状ガス通路を通過すると圧力損失により突流が低減されるように、前記環状ガス通路が、溶接開始時における前記シールドガスの突流を抑制する前記シールドガスの粘性を発生するように形成されたことを特徴とするアーク溶接用ガス流量制御器。 In the gas flow controller for arc welding, which is provided in the middle of the shield gas piping of the arc welding apparatus, for suppressing the rush of shield gas,
The gas flow rate controller has a controller body in which a through hole parallel to the shield gas flow is formed on the side to which the upstream side of the shield gas pipe is connected;
A gas flow controller including a rod portion inserted coaxially into the through hole,
An annular gas passage is formed between the inner surface of the through hole and the outer surface of the rod portion ,
The shielding gas flows through the annular gas passage toward the axial center of the rod portion;
The cross-sectional area of the annular gas passage is a cross-sectional area that can ensure a predetermined shield gas flow rate at a steady-state pressure during welding work,
When the distance between the outer diameter of the rod portion and the inner diameter of the through hole is set to a small gap that suppresses the rush flow at the start of welding, and the shield gas passes through the annular gas passage, the rush flow is reduced due to pressure loss. As described above, the gas flow controller for arc welding is characterized in that the annular gas passage is formed so as to generate the viscosity of the shield gas that suppresses the rush of the shield gas at the start of welding.
基端側に前記第1の配管接続部材の先端側が接続されて、先端側に前記シールドガス配管の下流側が接続される第２の配管接続部材と、を備え、
前記ガス流制御子は、基端側に形成された前記ロッド部が前記貫通穴に同軸に挿入され、先端側にフランジ部を形成し、前記フランジ部に基端側から先端側に貫通するオリフィスを備え、前記フランジ部が前記第１の配管接続部材と前記第２の配管接続部材との間に固定されたことを特徴とする請求項１に記載のアーク溶接用ガス流量制御器。 The controller main body is connected to the upstream side of the shield gas pipe on the base end side, and a first pipe connecting member having the through hole formed on the base end side;
A distal end side of the first pipe connection member is connected to the proximal end side, and a second pipe connection member is connected to the distal end side of the downstream side of the shield gas pipe,
The gas flow controller is an orifice in which the rod portion formed on the proximal end side is inserted coaxially into the through hole, forms a flange portion on the distal end side, and penetrates the flange portion from the proximal end side to the distal end side. The gas flow controller for arc welding according to claim 1, wherein the flange portion is fixed between the first pipe connection member and the second pipe connection member.
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| JP2010241785A JP5639847B2 (en) | 2010-10-28 | 2010-10-28 | Gas flow controller for arc welding |
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| JP2010241785A JP5639847B2 (en) | 2010-10-28 | 2010-10-28 | Gas flow controller for arc welding |
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| JP5639847B2 true JP5639847B2 (en) | 2014-12-10 |
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| US10293426B2 (en) | 2014-01-07 | 2019-05-21 | Lincoln Global, Inc. | Increased durability welding torch assembly and components |
| KR101846812B1 (en) * | 2017-09-28 | 2018-05-28 | 엘리펀트(주) | welding torch muffler |
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| JPS58102271U (en) * | 1981-12-28 | 1983-07-12 | 日立精工株式会社 | Shield gas supply device for TIG welding machine |
| JPS6095300U (en) * | 1983-12-06 | 1985-06-28 | 石川島播磨重工業株式会社 | Shield gas supply device |
| JPS62174783U (en) * | 1986-04-25 | 1987-11-06 | ||
| JP2005186087A (en) * | 2003-12-24 | 2005-07-14 | Toyota Motor Corp | Welding wire feeding apparatus and shielding gas feeding method in arc welding equipment |
| JP2006326677A (en) * | 2005-04-25 | 2006-12-07 | Fuji Heavy Ind Ltd | Welding equipment |
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